I want to create an upsert action that will create a new record if no id is contained in the request and update the record if there is an id in the request. I thought that this might be the default behavior without upsert_identity or upset_fields options being set. However, none of these configurations works:

Action definition

    create :save do
      upsert? true
      upsert_identity :unique_id
      upsert_fields {:replace_all_except, [:id]}
    end

Code Interface definition
define :save, action: :save

  identities do
    identity :unique_id, :id
  end

However when I call:

instance = Resource.save!(%{name: "Name"}, tenant: "tenant")
instance2 = Resource.save!(%{name: "Name2", id: instance.id}, tenant: "tenant")

a second record is created in the database.